Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to version 3.17.2, disabling symbol_keys on a reused Oj::Parser instance triggers a heap use-after-free. When symbol_keys is toggled from true to false, opt_symbol_keys_set frees the internal key cache (cache_free) but does not clear the pointer. The next parse call reads from the freed cache via cache_intern, producing a use-after-free. This issue has been fixed in version 3.17.2.
Metrics
Affected Vendors & Products
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| Ohler |
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References
History
Wed, 01 Jul 2026 10:30:00 +0000
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| First Time appeared |
Ohler
Ohler oj |
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| Vendors & Products |
Ohler
Ohler oj |
Tue, 30 Jun 2026 23:45:00 +0000
| Type | Values Removed | Values Added |
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| Description | Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to version 3.17.2, disabling symbol_keys on a reused Oj::Parser instance triggers a heap use-after-free. When symbol_keys is toggled from true to false, opt_symbol_keys_set frees the internal key cache (cache_free) but does not clear the pointer. The next parse call reads from the freed cache via cache_intern, producing a use-after-free. This issue has been fixed in version 3.17.2. | |
| Title | Oj: Use-After-Free in Oj::Parser Symbol Key Cache Toggle | |
| Weaknesses | CWE-416 | |
| References |
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| Metrics |
cvssV4_0
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-06-30T23:03:15.696Z
Updated: 2026-06-30T23:03:15.696Z
Reserved: 2026-06-16T13:49:33.555Z
Link: CVE-2026-54899
Vulnrichment
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NVD
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Redhat
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